The new forged clubs from Nike Golf are designed specifically as a progressive set for the better player, company technicians say. The longer irons, from Nos. 3 to 6, feature a pocket cavity that is made to promote a higher trajectory, so approach shots from those sticks land more softly on the greens. In an effort to provide preferred sound and feel as well as to promote greater forgiveness and increased ball speed, Nike engineers also added polymer, which they frequently refer to as “shotmaking gel,” to the club pockets. As for the shorter irons, from 7 through pitching wedge, they employ a so-called split cavity for a more penetrating, precision ball flight, with a profile similar to a blade at address.